Mold for radiator or like sections.



PATENTED JAN. 31, 1995-.

I D. M. 'YNESBIT. v A

MOLD FOR RADIATOR 0R LIKE smnons.

I Java? /77. i204 APPLIOATION FILED-AUG. 23, 1904.

] may UN T En STATES Patented January 31, 1905.

PATENT FFICE.

TO ASHWELL & NESBIT,LIMITED, OF LONDON, ENGLAND.

MOLD FOR RADIATOR OR LIKE SECTIONS.

SPECIFICATION forming part of Letters Patent l\ To. 7 81,223, dated January 31, 1905.

Application filed August 23,1904. Serial No. 221,894.

To all whom, it may concern:

Be it known that I, DAVID MEIN NEsBIT, a

subject of the King of Great Britain and Ireland, residing at 12 Great James street, Bedford Row, London, W. 0., England, have invented certain new and useful Improvements in Molds for Radiator or Like Sections, of which the following is a-specification.

This invention relates to improvements in connection with molds for radiator-columns, tubes, boxes, and the like, in which it is desirable to employ metal of minimum thickness alike for the purpose of reducing weight and for cheapening the production of the articles.

The difficulty in connect-ion with the casting of metal sections for radiators, metal boxes, pipes, and columns at the present time is that the molten metal when running-into the mold is apt to become somewhat cooled before reaching the extreme end of the mold and thus to cause a Want of homogeneity in the castings and frequently to result in porous and imperfect casting being produced from such mold. To remedy this difficulty,

it is usually found necessary to employ metal of greater actual volume than is absolutely required for the thickness ofthe walls, so that the heat may be retained therein, as a thin column of molten liquid does not travel sufliciently fast through the core-passages of the mold to enable fluidity to be properly maintained. Th us the castings have to be actually made thicker than the strength of the metal requires for the sole purpose of insuring that when the molten metal is introduced it shall remain sufficiently fluid and one portion shall not set or cool before the other.

To obviate the waste of metal and the employment of thicker castings than is absolutely necessary for the walls of the pipes, radiator-sections, and the like, I provide within my mold or core a number of guide-like runner-passages that will serve as conduit-leading troughs or feeders, so that as the metal flows along them they attract or draw along the main body of the metal. These guidingtroughs are preferably made of a sinuous character or of a zigzag form, so that the metal will flow freely over the entire surface of the mold and a rapid running of the molten 5 metal from one end of the casting-mold to the other be thus insured. leaderlike grooves preferably on the core, so that the resulting ribs are within the interior of the casting when the exterior is desired to be plain or of a nature that the surfaces are not to be interfered with by the groove-run-- *portions to be running down the mold and drawing with them the other metal to fill the thinner or wall-like sections.

I-do not limit the application of my inven-. tion to any particular form of projection or rib-like runner. Neither do I provide such ribs or leading-grooves in any special position;,but I place such leading-grooves and I make my guides or runner-like guides within and upon the surfaces of the mold to suit the possibilities of sluggish movement of the metal therein and the special conditions that may be necessary for the particular casting that is to be pro- 'duced.

In order that the invention may be properly understood, reference is made to the accompanying drawings, wherein, by way of example Figures 1 and 2 show, respectively, in longitudinal sectional plan and cross-section a mold prepared ready for casting a radiatorcolumn in accordance with the invention.

The mold-box is of the usual type, comprising an upper boX a and a lower box'b. The sand in the boxes is molded by patterns to the required form, while the core cis molded with sinuous channels d. Thus when the core is placed in position, as shown, and the metal run into the space 6 it enters the sinuous channels d, runs quickly along the same, and tends tov draw the metal along the mold, the rapid filling of the mold thus attained obviating premature cooling of the metal and the attendant necessity for use of excessive quantity of metal. In the example illustrated the channels are formed in the core; but it is obvious that they may be in the mold itself, the resulting ribs being then on the exterior of the casting instead of the interior, as in the example shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A mold for radiator or like sections having a core therein and channels in the molding-face of one of said parts for causing a rapid flow of metal through the mold.

2. A mold for radiator or like sections having a core therein and sinuous channels in the molding-face of one of said parts for causing a rapid flow of metal through the mold.

3. In molds for radiator or like sections, a core having sinuous channels on its moldingface for causing a rapid flow of the metal through the mold.

In witness whereof I have hereunto set my hand in presence of two witnesses.

DAVID MElN NESBIT.

Witnesses:

ALBERT E. PARKER, VVALTER J. SKERTEN. 

